Makesabout 3 1/2 cups
                    
                
                
                    
                        
                            - Active time:30 min
 
                        
                            - Start to finish:1 3/4 hr
 
                        
                    
                
             
            
            
                
                
                
    
      
          
          
          
              
              
              
          
          
          
          
          
              
              
              January 2003
            
          
          
      
  
                
                
            
            
            
                This recipe is an accompaniment for garlic roasted potato skins. 
            
            
            
            
            
                
                    
                    
                    
                        
                            
                            
                            
                                
                                    
                                        - 
                                            3
                                            tablespoons
                                            extra-virgin olive oil
                                            
                                        
 
                                    
                                        - 
                                            1
                                            
                                            large onion, chopped (1 3/4 cups)
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            lb
                                            shallots, chopped
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            lb
                                            baby spinach, coarsely chopped
                                            
                                        
 
                                    
                                        - 
                                            3
                                            oz
                                            cream cheese, softened
                                            
                                        
 
                                    
                                        - 
                                            1
                                            
                                            (16-oz) container sour cream
                                            
                                        
 
                                    
                                        - 
                                            1/2
                                            teaspoon
                                            salt
                                            
                                        
 
                                    
                                        - 
                                            1/4
                                            teaspoon
                                            black pepper
                                            
                                        
 
                                    
                                
                            
                         
                    
                 
            
            
            
            
            
            
            
            
                
                    
                    
                    
                        
                            
                                
                                
                                
                                    
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Heat oil in a 12-inch heavy skillet over moderately high heat until hot but not smoking, then sauté onion and shallots, stirring, until lightly browned, about 2 minutes. Reduce heat to moderate and continue to cook, stirring occasionally, until softened, about 8 minutes more. Add spinach and cook, stirring, just until wilted, about 2 minutes. Remove from heat and cool slightly
                                         
                                    
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Transfer spinach mixture to a bowl, then stir in cream cheese, sour cream, salt, and pepper until combined well. Chill, covered, at least 1 hour.
                                         
                                    
                                
                             
                        
                    
                    Cook's note: Dip can be chilled up to 1 day (though the spinach will lose some of its color). Let stand at room temperature 15 minutes before serving.